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corbettmaths.com

https://corbettmaths.com· First analyzed 20 May 2026· Updated 20 May 2026
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corbettmaths.com
Desktop screenshot of corbettmaths.com
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Mobile

Sponsored

Hosting Provider

Automattic, Inc

IP Address

192.0.78.251

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 San Francisco, United States

ASN

AS2635

Server

Nginx

Nameservers

ns2.wordpress.com.ns1.wordpress.com.ns3.wordpress.com.

Performance

99

Core Web Vitals

Weight

First Contentful Paint
835 ms10%
Speed Index
1.1 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.5 MB
41 requests

Image Optimization

Lazy LoadResponsiveJetpack Photon (WordPress)
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
WordPress
cms
Twenty Twenty-Threev1.6
by the WordPress team
View Theme

Technology Stack

4 Technologies Detected

UI Components

1
Swiper

CSS Frameworks

1
Tailwind CSS

Web Servers

1
Nginx

Plugins

1
Jetpack

SEO Analysis

C65/100
19
9
0
Meta Tags14/15
Content5/12
Headings8/8
Technical21/25
E-E-A-T0/7
Images4/7
Links2/5
URL5/5
Social0/5
Freshness0/4
Mobile3/4
Indexability3/3
C
corbettmaths.comcorbettmaths.com

Corbettmaths – Videos, worksheets, 5-a-day and much more

Welcome to Corbettmaths! Home to 1000's of maths resources: Videos, Worksheets, 5-a-day, Revision Cards and much more.

Title Length56 chars

Recommended: 50-60 chars (~351px / 580px)

Description Length118 chars

Recommended: 120-160 chars

Issues (0)

    9 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    3 URLs

    3 sub-sitemaps

    robots.txt

    5 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    6/100
    Poor
    2 13 2

    This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

    Sponsored

    AI & LLM Readiness

    F33/100
    Bot Access
    20/25
    Machine Read.
    7/25
    Schema Data
    0/25
    Citation
    6/25

    AI Bot Access

    14/14 accessible
    AI Search
    OAI-SearchBot
    PerplexityBot
    Claude-SearchBot
    Gemini-Deep-Research
    DuckAssistBot
    Training
    GPTBot
    ClaudeBot
    Google-Extended
    Meta-ExternalAgent
    Bytespiderinfo
    Amazonbot
    Applebot-Extended
    CCBotinfo
    Fetch
    ChatGPT-User

    Machine Readability

    llms.txt
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    nav
    Text ratio:0%
    Words:61
    Token eff.:Too Short
    Depth:1/5

    Structured Data

    Microdata

    Citation Readiness

    Opening Summary15w
    Descriptive Headingsavg 2.5w
    Canonical URL
    Open Graph0/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (11)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    Sponsored

    Accessibility

    WCAG 2.1 Compliance

    Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
    A+
    92/100
    16
    Passed
    0
    Critical
    0
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    20/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    15/15
    Verifies form fields have labels, error messages are clear, and inputs are properly associated.
    Color & Contrast
    15/15
    Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
    Keyboard & Focus
    15/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    7/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

    Carbon Footprint

    SWDM v4 · Eco-Score

    Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
    45/100
    C
    194 mg
    CO₂e / view
    1.5 MB
    Page Weight
    60%
    Cleaner Than
    New Visitor
    222 mg
    vs
    Returning (cached)
    111 mg
    Annual (10K/mo)
    23.3 kg
    Emission Segments
    Data Center
    43 mg
    Network
    47 mg
    Device
    104 mg
    Resource Breakdown
    JavaScript
    30.2 KB
    Images
    1.3 MB
    CSS
    186.1 KB
    HTML
    22.2 KB
    Other
    3.6 KB
    Green Hosting Not Verified
    Automattic, Inc
    5 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    F

    Security Score

    36%Critical
    Interactive

    HTTPS

    No WAF

    44d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Google Trust Services

    Key Algorithm

    ECDSA (secp256r1) (256 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2

    Valid From

    04.04.2026

    Valid Until

    03.07.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (20)

    tls.automattic.com4stepsconnect.comacademiemaisondelacolline.comaccessallareased.co.ukaxispaulstew.comboring-soap.comcoplataforma.orgcoralvinedesign.com+12 more

    SHA-256 Fingerprint

    0F:AE:2F:BB:83:23:BE:5E:19:A4:FA:98:05:EA:02:10:A8:29:92:DF...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    alt-svc
    clear
    cache-control
    🟡 253s(max-age=253, must-revalidate)
    content-encoding
    ⚡ Brotli(br)
    content-type
    text/html; charset=UTF-8
    date
    Wed, 20 May 2026 20:29:25 GMT
    host-header
    WordPress.com
    Good Warning Issue

    Email Infrastructure

    Custom Mail Server

    Score

    90

    SPF
    DKIM
    DMARC

    DMARC Policy

    None (Monitor Only)

    MX Records (1)

    smtp-fwd.wordpress.com

    Domain Information

    corbettmaths.com

    Domain Age
    14y 3m

    Created

    23.02.2012

    Expires

    23.02.2031

    Last Updated

    07.02.2025

    Registrar

    Wild West Domains, LLC

    DNSSEC
    Not Enabled

    Privacy & Compliance

    CookieYes

    Cookie Consent Banner
    CookieYes
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: CookieYes
    Privacy policy page linked

    Mobile Compatibility

    Viewport & Responsive Test

    Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
    A
    86/100
    Mobile Friendly13 breakpoints
    Viewport Meta
    The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
    Responsive Design
    Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
    Touch Icons
    Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
    Readable Font Size
    Base font size should be at least 16px on mobile to ensure text is readable without zooming.
    Relative Units
    Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
    No H-Scroll Risk
    No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
    Tap Targets OK
    Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
    No Fixed Widths
    No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
    Viewport
    width=device-width, initial-scale=1
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Open Sans + PT Serif

    WCAG Partial
    74/100
    Readability
    /30
    22/30

    19px · LH 1.75

    Hierarchy
    /20
    16/20

    2.21x ratio · ✓ H1→H6

    WCAG
    /25
    20/25

    1.82:1 min contrast

    Performance
    /25
    16/25

    2 fonts · 4 req

    Heading Font

    Open Sans

    Sans42px

    Body Font

    PT Serif

    Serif19px

    Contrast Ratio

    1.82:1

    1 issue

    Reading Comfort

    Sans Headlines + Serif Body

    left aligned
    42px
    h1
    18px
    h2
    14px
    h3
    19px
    p

    ✅ Excellent readability: 19px body text is ideal for all devices.

    ⚠️ Partial contrast: 1 elements below WCAG AA threshold (min 1.8:1).

    ✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

    ✅ Strong hierarchy: Headlines are 2.2x larger than body text.

    ✅ Modern fluid typography: clamp() with rem units ensures zoom accessibility (WCAG 1.4.4).

    ✅ Lean font stack: 2 font families keeps load times fast.

    Buy on MyFontsFluid Type (rem)

    Color Palette

    11 unique colors
    10.32:1 AAA Light
    #ffffff
    Background· 68.6%
    #413f4a
    Secondary· 3.1%
    #cb2eef
    Accent· 11.5%
    #1979af
    Primary· 5.9%
    #fad49e
    Accent· 2.5%
    #e3e5d3
    Secondary· 2.5%
    #8dd5a6
    Secondary· 1.8%
    #e82e44
    Accent· 1.7%

    Business & Marketing Stack

    2 Tools Detected

    Growing

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    Privacy & Cookies

    1
    CookieYesSMB

    Cookie consent and privacy compliance tools

    2

    Categories

    2

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    11 Resources

    6
    Scripts
    5
    Styles
    1
    Async
    2
    Defer

    Top Script Sources

    cdn-cookieyes.com(2)corbettmaths.com(2)s0.wp.com(1)stats.wp.com(1)

    Website Identity

    corbettmaths.com

    14 years old
    Location detected: 🇺🇸 United Statesvia ip
    Wild West Domains, LLCen-GB

    Sponsored

    Last analyzed: 20 May 2026 at 20:29

    Historical Analysis & Change Tracking